The Librarian works well, but must be accompanied. It is a very expensive model points-wise.

I've been very happy with bikes. I've found them to have two priciple uses. First, twin-linked rapid fire, virtually eliminating misses. As with all rapid fire, the more the merrier. The second use is hard target hunting. There are two approaches to this. You can take advantage of the high relative number of special weapons, or use melta-armed trikes.

To my mind, a biker that is firing a special weapon is not twin-linkking and not rapid firing. In consequence, I only use special wepons if I have a few spare points. I much prefer to use a trike. A multi-melta mounted trike can still rapid fire against light targets, has double the "critical" range of a meltagun, AND has three to five ablative bikes around him to assure delivery to that range.

Tactically, bike squads are quixotic mixture of fragility and resilience. You don't have to roll a lot of 1's for a squad to melt away. Thus they are particularly prone to rapid-firing squads. Take full advantage of cover. Make sure that YOU decide where your bikes will make thier stand. With that in mind, bikes are actually quite resilient in HtH against line squads, so hide in combat if the fire envioronment is too hostile. Along that vein, a veteran with fist is very handy. I think it's ridiculous on a bike, but it's within the rules.

Marine bikes are not the value the chaos bikes and ork bikes are. Nor are they particularly easy to use. It comes down to a matter of taste and playing style. I wish you the best with them.

Duncan

(And no, I'm neither angry, pouting, nor vexed. I do, however have a 14 day old baby, a 5 year old daughter who is not in school in the summer, and a recently hugely pregnant high-maintainance wife. Oddly, I have no difficluty filling my days.